If you want a compact, budget-friendly solution for weekend trips and parking garages, choose Goplus Rooftop Cargo Carrier; if you need maximum volume, advanced locking security, and a complete travel bundle, choose Thule Force 3.
• Goplus: Best for drivers needing a reliable 14-cubic-foot box that fits standard racks without breaking the bank, though it lacks the premium integration of high-end brands.
• Thule Force 3: Ideal for families or adventurers requiring 18 cubic feet of space, tool-free installation, and a matching set of duffels, representing a higher initial investment for superior utility.
• Who is this for? Choose Goplus if your primary concern is fitting gear into tight spaces like underground parking while keeping costs low. Choose Thule if you prioritize sheer capacity, quick setup, and an all-in-one storage system.
The Goplus Rooftop Cargo Carrier is built with a specific mindset: maximizing utility within a manageable footprint. With 14 cubic feet of capacity, this hard shell unit offers enough room to transport bulky items like camping chairs, luggage sets, or sports equipment without completely overwhelming your vehicle's roofline. The design prioritizes aerodynamics, aiming to reduce drag and minimize wind noise, which is a critical factor for anyone driving on highways regularly. The sleek shape isn't just about looks; it serves a functional purpose in maintaining fuel efficiency and stability at speed.
For those who frequently navigate urban environments or tight spots, the dimensions of this carrier are a significant advantage. The physical profile allows it to slide into many standard parking garage clearances where larger, more aggressive boxes might scrape against concrete beams or height limiters. Its dual-side opening feature adds a layer of convenience, letting you load gear from either side of the car without having to walk around the entire vehicle. This is particularly useful when parked next to another car or in a cramped lot where access is limited.
However, this product has its limits. The 165-pound weight capacity is robust, but the construction relies on ABS and PC materials that, while sturdy, do not offer the same level of perceived premium feel as some competitors. The locking mechanism uses a double-lock design with a security key, which provides basic protection for valuables, but it does not feature the automated indicators found in more expensive systems. If you are looking for a no-frills, durable box that gets the job done for road trips to the beach or the park without demanding a complex mounting process, this is a solid choice. It is strictly for vehicles with crossbars between 17 and 22.8 inches wide, so verify your rack compatibility before committing.
The Thule Force 3 XL represents a different philosophy entirely, focusing on scale, ease of use, and comprehensive organization. Boasting 18 cubic feet of volume, this unit significantly outpaces the smaller competitor, making it the go-to option for extended family vacations, ski trips, or moving large amounts of gear that simply won't fit in the trunk. The extra four cubic feet translates to real-world space for multiple suitcases, skis, snowboards, or a full week's worth of supplies for a family of four. The aerodynamic shape is engineered to handle high speeds with minimal turbulence, ensuring the ride remains quiet even with a full load.
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-11-06 · 7 min read · Independent comparison
What truly sets this model apart is its user-centric engineering, specifically the SlideLock system and Quick-mount mechanism. The SlideLock system automatically secures the lid and provides a clear visual indication that the box is properly closed, eliminating the guesswork often associated with securing heavy cargo boxes. You won't have to wonder if the latch engaged correctly before hitting the highway. Furthermore, the Quick-mount system allows for tool-free installation with an audible click, meaning you can mount and dismount the box in minutes rather than wrestling with clamps and tools. This level of convenience is invaluable when you are in a rush or dealing with inclement weather.
Beyond the box itself, Thule includes a GoPack Duffel Set bundle that changes how you think about packing. The inclusion of four 75L duffels means you have soft storage that fits perfectly inside the hard shell or can be used in the trunk independently. These bags feature handles that convert to backpack straps, offering versatility for hiking or walking from the car to a hotel lobby. The tool roll-style storage keeps these duffels organized and accessible between trips. While the sheer size of the 18-cubic-foot box might challenge clearance in very low parking structures compared to smaller units, the internal organization and external ease of use make it a superior choice for serious travelers who value time and capacity over saving a few dollars upfront.
• Best for Parking Garages: Goplus Rooftop Cargo Carrier wins here due to its slightly lower profile and compact 14-cubic-foot design, reducing the risk of scraping low ceilings in older or tighter structures.
• Best for Maximum Volume: Thule Force 3 is the clear winner with 18 cubic feet, providing ample room for large families or extensive gear lists that the smaller box simply cannot accommodate.
• Best for Installation Speed: Thule Force 3 takes the lead with its tool-free Quick-mount system and audible click feedback, whereas the Goplus requires manual alignment with quick-connect anchors.
• Best for Locking Security Feedback: Thule Force 3 features the SlideLock system that visually confirms the lid is secure, offering peace of mind that the Goplus's standard double-lock key system does not explicitly provide.
• Best for Packing Organization: Thule Force 3 includes the GoPack Duffel Set with convertible backpack straps and a dedicated tool roll, creating a complete travel ecosystem that Goplus does not offer.
• Best for Budget-Conscious Buyers: Goplus Rooftop Cargo Carrier offers a high-capacity solution (14 cu ft) with essential durability features at a price point that typically appeals to those watching their spending.
• Best for Weather Resistance: Both utilize durable materials, but the Goplus emphasizes metal lid stiffeners for stability in harsh conditions, while Thule focuses on the integrity of the sliding seal and lock mechanism.
• Best for Dual-Sided Access: Both products offer dual-sided openings, but Thule's integration with the SlideLock system ensures easier access management when loading from both sides.
In my opinion, I would buy the Thule Force 3 for any serious long-term ownership because the combination of 18 cubic feet of space and the included duffel bundle offers a completeness that the Goplus cannot match. The SlideLock system alone saves me from the anxiety of wondering if my gear is secure, and the tool-free installation makes every trip start faster. However, if your primary constraint is navigating low-clearance parking garages in a city or you need a temporary, cost-effective solution for occasional use, the Goplus Rooftop Cargo Carrier is the smarter practical choice. Ultimately, if you plan to drive through tight parking structures often, the Goplus might be the safer bet for your vehicle's clearance, but for pure utility and quality of life, the Thule is the superior engineering package.
While specific height dimensions vary by vehicle, the Goplus features a sleek aerodynamic design intended to reduce overall profile. However, users should always measure their vehicle's total height with the box installed before entering low-clearance parking structures, as the added height may exceed limits in older facilities.
The Thule Force 3 includes a SlideLock system that automatically secures the lid, providing integrated security. Unlike some entry-level models, it is designed with built-in locking mechanisms, though you should always check the specific packaging contents to confirm if additional padlocks are included for the key cylinder.
The Thule Force 3 offers 18 cubic feet of storage compared to the Goplus's 14 cubic feet. This difference of 4 cubic feet is substantial, allowing for roughly 25% more volume to store larger items like ski boots, multiple suitcases, or bulkier camping equipment.
Yes, the GoPack Duffel Set included with the Thule Force 3 consists of four 75L bags that function independently. They feature handles that convert to backpack straps, making them versatile for use in the trunk, on hikes, or for general travel storage outside of the roof box.
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